Improvement in sewer-gas traps



G. ANTHUN.

Sewer GasTraps.

'NaN-1,412.

Patented August 5,1873.

/c 1 .f ff f7 f I g M #my M? W@ A M PHOTO-L mi 0 GRAPH/c co, lv. Hamam/s Ra 053s] GEORGE O. ANTHON, OF NEW YORK, N. Y.

IMPROVEMENT IN SEWER-GASTRAPS.

Specication forming part of Letters Patent No. LALAJQ, dated August 5,1873; application tiled June 14, 1873.

To all whom it may con/oem:

Be it known that I, GEORGE O. ANTHON, of the city, county, and State of New York, have invented a new and useful Sewer-Gas Trap, to be used in connection with washbasins, bath-tubs, water-closets, &c. 5 and that the following, taken iu connection with' the drawings, is a full, clear, and exact description thereof.

In the drawings, Figure l is an elevation of the trap as applied to a wash-basin, shown in section. Fig. 2 is a vertical section through the top of the cover; and Fig. 3 is a vertical section at right angles to the former through the trap.

I have been led to the present invention by experience of the siphoning out of the ordinary U-trap, and by knowledge ot the fact that this trap, even when provided with a trap-screw, can seldom be cleansed, when stopped up, without the aid of a plumber. All persons who have attentively considered the operation of the common trap will remember that at times a gurgling noise proceeds from it just at'ter the last particles ot' Water have disappeared from the basin, tub, or sink. This noise is caused by the trap emptying itself when the velocity through it is too great, and the trap is then said to siphou out. When it does so it no longer serves as a sewer-gas trap, and the sewer smell and gases enter the house.

My improved trap consists of a box, cylindrical or of other shape-cylindrical, by preference-and open, at top. Into the bottom of this box the soil-pipe, or pipe leading to the sewer b, is introduced and extends up some distance above the bottom, as at a. Into the side of this box the waste-pipe c from the basin, tub, or sink leads; and its open end inside the box must be at a lower level than the orilice or open end ofthe sewer-pipe. Either pipe or both may enter through the sides of the box, or either or both may enter through the bottom. I prefer the arrangement shown in the drawing.

This open box would not answer for a sewergas trap for two reasons: first, it would leave the open end ofthe sewer-pipe unclosed, so

that the gasy would enter the house; second, it would be liable to overflow in case thehead was too great in the waste-pipe, or in case the sewer-pipe were partiallyclosed. Y

Itheret'ore fit upon the box a cover', c, made up of the cover proper e and walls ot' a cylinder, ff, descending from it. This cylinder must be small enough to enter the box and extend so far down that it will enter the liquid, which will have its upper surface level with the top of the sewer-pipe. I prefer to make this cylinder extend nearly to the bot` tom of the box and cut a hole, g, in one part of it, so that the cylinder can straddle ,the waste-pipe c.

I prefer to make the cylinder or walls ot' the cover a close fit to the inner surface ot' the walls of the box or trap proper-a closer litv than is shown in the drawings, the only limit to its closeness being that the walls ot' the cover shall not stick fast to the sides ot' the trap, thus preventing easy removal of the cover.

I prefer, also, to attach an outside rim to the cover, as shown at It h, but this is not essential. I also prefer to attach to the cover a ring, or some means ot' lit'ting it, and to secure to the outside of the trap a pin, which will take into a groove inf the outer rim ot the cover. The cover is thus secured by a baycnet-joint to the trap.

A hook, pin, bolt, or other contrivance may be substituted for this fastening, or it may be dispensed with and the cover weighted or made so heavy that it will stay down.

It is clear, from inspection ofthe drawings, that no gases from the sewer-pipe can escape without passing down through the liquid in the trap and under the lower edge otl the cylinder making part of the cover. Consequently they cannot escape at all. The only possibility of gas escaping willbe at thejoint ot' the cover with the top of the box, it' it be loose, and all the gas that could escape in that way, even if the joint were open, would be that rising from the small annularjsurface of liquid bounded on one side by the walls of the nur FFICE.'

topped box and a cover provided with a cylinder, as described, and having pipes for the entrance and exit of fluids, arranged substantially as set forth.

GEO. O. ANTHON.

In presence of- J. PROFFATT, WM. O. SHIPMAN. 

